A reader says he's afraid someone will slip and end up hurt. Umbra offers a little ice-breaker.
A reader says he's hounded by mold in his basement and attic. Umbra says this cleanup job is going to be a dog.
A reader wonders about the greenest way to hit the slopes, and which slopes are greenest. Umbra gives him a lesson.
A reader wonders why it’s so hard to work wind and solar power into the grid. Umbra gets a real charge out of the question.
A reader inquires about bovine flatulence. Umbra lets it rip.
A reader is udderly flummoxed by the range of options in the non-dairy aisle. Umbra goes nuts.
A reader wants to pop some eco-groovy, fair-trade tags for her toddler. Umbra says one tike's trash is another kid's come-up.
A reader wonders if blazing bulbs are just a waste of energy. Umbra heads to the scene of the crime.
A reader insists she can scrub circles around even a super efficient dishwasher. Umbra brushes up on the basics.